Wrap-around hose clamp



Dec. 4, 1951 M. J. zALEsKE WRAP AROUND HOSE CLAMP Filed Aug. 3, 1946lNvENToR M/CHAEL J. ZA l ESA/E ez ATTO RN EYS Paten-ted Dec. 4, 1951WRAP-AROUND HOSE CLAMP Michael J. Zaleske, Union, N. J., assignor toIdeal Clamp Manufacturing Co., Inc., New York, N. Y., a corporation ofNew York Application August 3, 1946, Serial No. 688,255

1 Claim. 1

This invention relates to hose clamps and more particularly to a new andimproved "wrap around type hose clamp. The main object of the inventionis to provide a hose clamp of the wrap around type that ts all commonsizes of hose, that is simple and economical to make, and that isadapted to be tightened to an extraordinary degree of tension withoutdanger of breaking under the strain.

The clamp comprises a single elongated band or strip of pliablematerial, such as sheet metal, that can be Wrapped around a hose of anycommon size, together with a simple holding or tightening device thatcarries one end of the band and is adapted to receive its other or freeend when the band has been wrapped around the hose. Then a screw of saiddevice can be operated to thrust the carried end of the band against thefree end, in a direction of pull substantially tangent to the hose, bysuch means that the free end is bent backward and conned upon a base ofsaid device while the wrapped portion is constricted upon the hose, andwhile lateral strains resulting at the carried end of the band arecounteracted so as to prevent bending or breaking of the tighteningmeans of said device.

A manner of attaining the objects and advantages of this inventionwill-"become apparent from the following description-of an exemplaryembodiment and from the accompanying drawing in illustration thereof,while the improvements constituting my invention will be defined in theappended claim.

In the drawing,

Fig. l is a side elevation of the clamp as-l sembled on a hose and incondition to be tightened, the hose appearing in cross-section;

Fig. 2 is a similar view, the clamp having been tightened;

Fig. 3 is an enlarged vertical section through the holding andtightening device;

Fig. 4 is a plan view of said device, and

Fig. 5 is a perspective view of the pusher element of said device.

The drawing shows a hose clamp composed of four main elements: a pliableclamp band I, an angular saddle or frame 2, a peculiarly formed pusher3, and a screw 4 which carries the pusher and one end of the band on itsend.

The band I is simply an elongated strip of strong pliable material, suchas low carbon sheet steel of about .016l thickness, suitable for hoseclamp use. One end portion, by which it is xed and carried ashereinafter described, is formed with a reinforced hole 5 (see Fig. 3).The band is made long enough to extend from this fixed end portion Iaentirely around any common size of hose, such as hose A to be clampedupon nipple B, and still to leave a free end Ib from which any unwantedexcess, such as Ic, may simply be cut off and discarded. The holding andtightening of the band upon the hose are achieved by the device composedof saddle 2, pusher 3 and screw 4.

The angular saddle or frame 2 has a base 6 formed with an opening 1through which to extend two portions of the band I, as hereinafterdescribed. It also has an upright arm 8 formed with a threaded aperture9 in which the screw 4 is threaded so as to be extended over the base 6.

Lateral flanges 2a and 2b extend along this base to rest upon the hoseand afford space for the band. These flanges also strengthen the anglebetween the base 6 and the arm 8 when they are extended around thisangle as shown. The base 6 is adapted to lie at the surface of the hosein a position transverse to the hose axis, for which purpose itpreferably has an yarcuate shape as shown. In that position the path ofthe end of the screw 4 is spaced somewhat above but substantiallyparallel to a line tangent to the curvature of the hose.

The screw 4'is formed with a driving head I0 and with a stud II at itsoperating end. This stud is extended first through the hole 5 in theband end and then through a hole I2 in the central portion of the pusher3, so that the band end Ia is held secure and so that it and the pushermaybe thrust forward as a unit when the screw is so turned in bore 9 asto be extended farther over the base 6. The central portion of thepusher bordering hole I2 preferably has a depression I4 from the pusherface I5, and a retaining head I6 is formed on the end of the screw studII within this depression. If desired, the bandA end portion Ia may beprovided with a second flanged opening Id to permit access to the screwstud for forming the retaining head IB.

The pusher preferably is shaped out of relatively heavy sheet metal, andso as to provide its face I5 in a convexly curved form having upper andlower marginal portions 15a and I5b, respectively. As appears from Figs.1, 2 and 3, the fixed end portion Ia of the band extends upward from thehole 5, where it receives the screw stud II, to the upper margin I5a ofthe pusher and thence down over the curved face I5, and from the lowermargin I5b of the pusher the band passes through the opening I in base6.

Ihe pusher 3 is formed also with an integral portion I1 above its lowermargin which is arranged to bear against the under side of the screw 4at a location spaced from the stud II toward the driving end I0. Thisportion I'I preferably is an upwardly extending flange integral with thebody of the pusher 3, and it preferably has an arcuate'groove-I'Ia(Fig-5) .inzitsmargin which forms a seat `or .bearing fortthe adjacentsurface I9 of the screw.

Previous to its use, the clamp may have the operating end of the screw 4andthe assembly thereon retracted toward arm 8, with --theband Iextending through opening A'I in..a.-straight or flat condition.

To apply the clamp to a hose, such aszhosef-A, the saddle is simply heldby.one hand wit-hits base at the surface of the hose, an'dthe"b2rn`c1 iswrapped around the hose by the other han'dand brought upwardly throughthe opening 'I. Upon pulling .the freeendlb taut..by.hand;and thenbending yit .backwardsomewhat ,over -the underlying` part of base 6, theclamp acquires anapplied butuntightened conditionf.substantially. asshown inFigfl. It then. issecured and tightenedsirnply-byoperating thescrew `d sonas tothrustthe assemblyat the screw f end farther over `the.said partofbase.

Inftheourseofthat tightening movement the part of band end la overlyingthe lowermargin I bA of .the pusher` facerst vengages .the free. bandend Ib just above. its .backward .bend .at.the..mar gin .0f-opening'1,and the continuedmovement clamps the free band end. backward. overlthesaid part Aof vbase `I,..s1`1bstantially.as appearsin Figs. 2*y andai?..This continuedv movement. also thrusts end Imforward so .that thereisalsubstantially tangentiahpullupon and acontraction of thatportion-'of .the Yband. encircling 4.the hose. So the hose. becomesconstricted .orcl-amped tightly .upon the .nipple B, =with` a;substantially .uniform force around its circumference.

. Meanwhile, Y.a .lateral or .bending.stressfarises uponthepusher auditsconnectionv'with the serew--stud I I,.w.hich increases as v.the strainonthe v@band andthe .clamping force increase, `for that. vstrain exerts.a-force .component .urging the lower margin |512 of the.pusher-.radially.upward towardrthescrew .4. This force ycomponent-orstress, however, Y.is .absorbed lor .counteracted .by the 4bearing .of.-eXtension II `.at IM against fthe underfside ofthe screw at I9..Theclampthus canbetightened to anzextraordinarilyfgreat,tension or.`clamping force .without .danger of. bending or breaking eitherthepusher..31 orthe fixed fend of :.theband .at 5 away..- from itsrespectivesuppor-tatthe end ofthe screw.

It. will be .understood that various modifications of theembodimenttabove described .and illustrated. inA thedrawing-.may beresortedto without departingffromthe novel .features of Tuy/.invention,which .areintended -to .be--dened-in .the appended claim.

5 Number I claim:

A hose clamp comprising a flexible band having a free severable leg andanother leg and of a length greater than the circumference of hose to beclamped, a rigid one-piece angular frame having a base and an uprightarm, said base being formed with an opening freely receiving saidvotherzleg.5of said bandand adapted to receive lits freelegwhenthe bandispositioned-to clamp a hose, said arm having a threaded bore and carryinga screw threaded through said bore to extend voversaid base, the screwhaving an intelgral"a'iialjstud of reduced diameter on its end,@a1-.rigid .onepiece1angular pusher held on the zscrewiwithin theeangleof said frame and having Ianupiightportion.- and a base portion bentback- .ward therefrom toward the arm of said frame, said "base Vportionextending backward beneath and beyond said stud and bearing against theunder side of the screwzthread, the other leg of said band "extendingthrough said opening and under thefpusher baseportion and thenceover theface of said uprightportionand .to anend portion bent backpvervtheinside.thereof,.said band end portion .and saidpusher uprightportionhaving .registering central openings therein,saidrstud,,extendingrotatably through said openingsand holdingthepusherand said other leg on the end .of said. screw .with .the pusherbase portion-underlying .thethread of .the screw, the pusher baseportion actingthroughsaid other. leg to clamp the free leg.,of.the.bandagainstithe frame. .baseY when -thesCrew is advanced thereover to clampAthefpositioned. band on la hose,.. and the pusher base portion .at the,same-.time bearing against the 4screw .thread to help -sustain theclamping...tension.

.MICHAEL J. ZALESKE.

REFERENCES CITED The-followingrreferences 4are of record in the ley ofthis :patent:

Name Date Erickson.. .,Feb. 9, 1909 Erickson Aug. 19,1913 :MallevilleSept. 22,1914 `.Lopdell Apr. 11,A 1922 Malleville Oct, 14, 1930 .Suchter,Apr. 24, 1934 Caillau Mar. 9,1937 vProchaska Oct-15y 1940 BlackJan..11, 1944 FOREIGN PATENTS .Country Date "Germany Dec. 22, 1919 Great.Britain Sept. 22, 1936 France Sept. 18. 1928 Number

